Very weird. I took a quick look through the various JavaScripts that you employ on the page, but I didn't see anything that was looking at the hash (#foo) value of the URL and reacting to it. It is definitely due to some javascript though - if you view source the whole of the page is available and if you just disable CSS you can see everything too. Try disabling one script at a time until it stops (either by removing it from your skin, disabling the plugin, or using a script blocker like NoScript for Firefox.)

I found these lines in my CSS (which I got from http://www.oswd.org)

/*** Correction for non-IE browsers ***/
#wrap {
overflow: hidden;
}

/*** Correction for IE 5.01 ***/
#wrap {
/* float: left; */
float: none;
}

I don't know what these mean but I remove them and now I don't see the problem.

Thanks for helping. It was really annoying. I tested with IE 6 & Firefox 1.5...skin looks good now...